Fuel supplying device of igniter

ABSTRACT

A fuel supplying device of igniter includes a fuel chamber with an outlet, a gas discharge section, a buffer and a drainage core installed in sequence, wherein an end of the gas discharge section is extended from the outlet for controlling the output of the fuel, the buffer is provided for absorbing the pressure produced by discharging the fuel, and the drainage core has an external pipe disposed around the periphery of the drainage core, such that only a portion of the drainage core that has its back facing the buffer is exposed in order to reduce the fuel incoming area of the drainage core. Thus, the pressure of the fuel passing through the drainage core and buffer is reduced, so that when the fuel is lighted up, there will not be any danger due to the high pressure of the fuel.

FIELD OF THE INVENTION

The present invention generally relates to a fuel supplying device ofigniter, and more particularly to a fuel supplying device of igniterthat comes with a safety measure for preventing an excessively largepressure when the fuel is discharged.

BACKGROUND OF THE INVENTION

Science and technology advances day after day, and people spare noeffort to renovate and make progress in the development of technologicalinventions, not only emphasizing on high-tech products and areas, butalso on products for daily uses. To improve the convenience andpracticability of these daily products or bring our life to a higherquality level or have a better life, constant discoveries andimprovements are made according to the inconvenience of our life and thecomplaints of the poor design of the daily products.

For example, igniter plays an important role in barbeques, and there areall kinds of igniters, and one among these is a pressurized gas igniter.The pressurized gas igniter stores a high-pressure gas, and the pressureof the gas is about 10 atmospheres (which equals to 10.336 Kg/cm²).

Referring to FIG. 1, a fuel pipe of igniter has a gas chamber (not shownin the figure) comprised of a hollow adjusting button 50, a copper pipe51, a copper casing 52 and a copper base 53. The copper pipe 51 includesa folded wire 54 extended from the interior and both ends of the wire 54are disposed in the copper pipe 51. The distance between the wires 54 isvery short, such that gas can be sucked between the wires 54 by acapillary action. One side of the copper casing 52 is disposed outsideone side of the copper pipe 51, and another side of the copper casing 52includes a hollow area 520 for collecting the gas. The copper base 53 isdisposed on the copper casing 52 at a position proximate to the hollowarea 520 and with its back facing an end of the copper pipe 51. Thecopper base 53 also can absorb the pressure of the gas, such that thegas will not leak when it is discharged.

From the description above, the components of the fuel pipe are usuallymade of copper to resist the high pressure of the gas, so as to maintainits normal operation. However, the material and manufacturing cost ofcopper is very high, and thus manufacturers have to carry a higher costand sell the products at a higher price. As a result, users have to payfor an unreasonably high price for the product. Furthermore, copper hasa heavy weight, which is not easy to be handled by women or aged people.

SUMMARY OF THE INVENTION

In view of the shortcomings of the prior arts, the inventor of thepresent invention conducted extensive researches and experiments andfinally developed a fuel supplying device of igniter in accordance withthe present invention.

Therefore, it is a primary objective of the invention to provide a fuelsupplying device of igniter, which includes a fuel chamber forcontaining fuel, and the fuel chamber has an outlet disposed on one endand having a gas discharge section, a buffer and a drainage coreinstalled in sequence. An end of the gas discharge section is extendedfrom the outlet for controlling the output of the fuel. The buffer isprovided for absorbing the pressure produced by discharging the fuel,and the drainage core has an external pipe disposed around the peripheryof the drainage core, such that only the portion of the drainage corethat has its back facing the buffer is exposed in order to reduce thefuel incoming area of the drainage core. The pressure of the fuelpassing through the drainage core and buffer is reduced, and the fuel isdischarged from the gas discharge section, so that when the fuel is lit,there will not be any danger due to the high pressure of the fuel.

The above and other objects, features and advantages of the presentinvention will become apparent from the following detailed descriptiontaken with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a prior art;

FIG. 2 is a schematic view of a first preferred embodiment of theinvention;

FIG. 3 is a schematic view of a second preferred embodiment of theinvention; and

FIG. 4 is an exploded view of a preferred embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 2 and 4 for a fuel supplying device of igniter of theinvention, the fuel supplying device 1 includes a fuel chamber 10 forcontaining a fuel such as methane or butane, and the fuel chamber 10 hasan outlet 120 at one end, and the fuel supplying device 1 also includesa gas discharge section 20. The fuel supplying device 1 further includesa gas discharge section 20, a buffer 30 and a drainage core 40. The gasdischarge section 20 is disposed at the outlet 120, and one portion ofthe gas discharge section 20 is protruded from the outlet 120 forcontrolling the output of the fuel. The buffer 30 is installed in theoutlet 120 at a position facing another end of the gas discharge section20 for absorbing the pressure of the fuel when the fuel is discharged.The drainage core 40 is installed in the fuel chamber 10 at an end ofthe gas discharge section 20 with its back facing the buffer 30. Thedrainage core 40 includes an external pipe 410 wrapped around a portionof the periphery, such that the drainage core 40 does not wrap aroundthe incoming portion of the external pipe 410 in order to reduce thefuel incoming area of the drainage core 40. When the fuel is dischargedfrom the fuel chamber 10, the drainage core 40 is used to reduce theincoming fuel, such that the flow of fuel is reduced and the pressure islowered to pass the fuel to the buffer 30. The discharged pressure isabsorbed, so that the fuel pressure released from the gas dischargesection 20 will not be too large or cause any potential danger.

Referring to FIGS. 2 and 3 for a preferred embodiment of the invention,the drainage core 40 is made of a foam material, and the drainage core40 has a plurality of pores at it surface. The fuel is a liquidcompressed with a high pressure, and thus the fuel can be permeated fromthe surface of the drainage core 40. Since a large quantity of fuel inthe fuel chamber 10 is pushed towards the pores on the surface of thedrainage core 40, the fuel is forced to pass through the drainage core40 to the buffer 30. The external pipe 410 wraps the drainage core 40,such that only a part of the drainage core 40 which is far from thebuffer is exposed. The external pipe 410 is a durable pressure-resistingmetal pipe, and the fuel is forced to permeate from the unwrappedportion of the drainage core 40. Therefore, the exposed area of thedrainage core 40 is reduced. The fuel passing through the pores isreduced and forced to flow into the drainage core 40 through a maximumdistance of the outlet 120 at a position far from the outlet 120 asshown in FIG. 4. Therefore, the flow of the fuel is slowed down and thepressure of fuel passing the drainage core 40 is reduced greatly.Further, the optimal length of the external pipe 410 that wraps aroundthe drainage core 40 is 9/10 of the length of the drainage core 40, andthe minimum length is preferably not less than ⅓ of the drainage core40.

Referring to FIGS. 2 and 4 for the invention, the drainage core 40includes an external sleeve 420 at the periphery of an end facing thebuffer 30, and the external sleeve 420 includes a plurality of gasoutlets 421 at an end proximate to the buffer 30, and an end of theexternal pipe 410 proximate to the buffer is coupled with the externalsleeve 420. When the fuel in the fuel chamber 10 is pushed by pressureto flow from the drainage core 40 towards the buffer 30, the fuel ispushed out from the gas outlets 421 to the buffer 30 by the highpressure. The external sleeve 420 could be integrally coupled with theexternal pipe 410, so that the external pipe 410 is extended to replacethe position of the external sleeve 420.

Referring to FIG. 3 again for the preferred embodiment, the buffer 30 iscomprised of a pin member 310 and a foam 320, and the foam 320 isdisposed at a position with its back facing an end if the drainage core40 reduces and absorbs the pressure of the fuel. The pin member 310 isinstalled between the foam 320 and the drainage core 40, and has aportion (substantially a nail member) passing through the foam 320 andexposed from the surface of the foam 320. An end of the buffer 30proximate to an end of the pin member 310 is disposed securely at an endof the external sleeve 420 to force the fuel coming from the drainagecore 40 to pass through the gas outlets 421 only. The fuel passes thegas outlets 421, and then enters into the foam 320 for anotherbuffering, and the fuel finally enters into the gas discharge section20.

Referring to FIGS. 2 and 4 again, the gas discharge section 20 installsa gas discharge pin 210, an adjusting member 220 and a control valve230. The adjusting member 220 is installed at a position facing thecontrol valve 230 and the adjusting member 220 has a hole 221 at an end.The adjusting member 220 further includes a first opening 222 at theother end. A portion of the control valve 230 is inserted into the firstopening 222. The control valve 230 is installed at a position facing thebuffer 30, and a surface of the control valve 230 facing the buffer 30includes an injection opening 231, and the other end of the controlvalve 230 includes a second opening 233. The gas discharge pin 210 ishollow and one end of the gas discharge pin 210 passes through the hole221 out of the adjusting member 220, and the other end passes throughthe first opening 222 into the second opening 233. The fuel is inputtedfrom the injection opening 231 of the control valve 230 and sent outthrough the pipe of the gas discharge pin 210.

Referring to FIG. 4 for the present invention, a protruded ring 211, asecond protruded ring 212 and a third protruded ring 213 are installedin sequence between the hole 221 on the gas discharge pin 210 and theinjection opening 231. A plastic pad 214 is installed at an end of thethird protruded ring 213 proximate to the gas discharge pin 210 forpreventing the fuel from permeating from the gap of the injectionopening 231. A gas incoming hole 215 is installed on the gas dischargepin 210 at a position between the plastic pad 214 and the thirdprotruded ring 213, such that the fuel is inputted from the gas incominghole 215 and outputted from an end of the gas discharge pin 210. A firstplastic washer 216 is installed on the gas discharge pin 210 at aposition proximate to an end of the second protruded ring 212, such thatwhen an end of the gas discharge pin 210 passes through the hole 221 andout from the adjusting member 220, the first plastic washer 216 canprevent the fuel from permeating from the periphery of the gas dischargepin 210 that is inserted into the adjusting member 220, and that maycause danger or accidents. In the meantime, the second protruded ring212 is slightly larger than the hole 221, so that the gas discharge pin210 will not be separated from the adjusting member 220. A resilientmember 217 is installed on the gas discharge pin 210 at a positionbetween the second protruded ring 212 and the third protruded ring 213for providing a resilience to resume the gas discharge pin 210 to itsoriginal position. Therefore, the injection opening 231 is sealed by theresumed plastic pad 214 that stops the output of the fuel.

Referring to FIG. 4 for the invention, an end of the control valve 230is coupled with the adjusting member 220 for containing a section of thegas discharge pin 210, such that the plastic pad 214 blocks theinjection opening 231, and the fuel cannot enter into the injectionopening 231. Further, a second plastic washer 232 is installed at thecontrol valve 230 proximate to a periphery of an end of the injectionopening 231 for preventing the fuel from permeating from the gap of thebuffer 30.

Referring to FIGS. 2 and 3 for the invention, a thread section 223 isdisposed around the adjusting member 220, and the adjusting member 220is turned to engage the thread section 223 with another thread section130 disposed inside an outlet 120. With the screwing depth of the threadsection 223 and another thread section 130, the tightness between thecontrol valve 230 and the buffer 30 can be adjusted so as to control theflow of the fuel. If the adjusting member 220 is turned towards adirection, the connection between the control valve 230 and the buffer30 is tightened slightly, and the quantity of the outputted fuel isreduced. On the other hand, if the adjusting member 220 is turned toanother direction, the connection between the control valve 230 and thebuffer 30 is loosened slightly, and the quantity of the outputted fuelis increased.

Referring to FIGS. 3 and 4 for the invention, a transversal rod 240 isinstalled at the outlet 120 of the gas discharge section 20, and the gasdischarge pin 210 penetrates an end of the transversal rod 240, so thatthe transversal rod 240 is latched on the first protruded ring 211 ofthe gas discharge pin 210. The transversal rod 240 uses the leverprinciple to move the gas discharge pin 210 outward, so that the plasticpad 214 is displaced to open the injection opening 231, and the fuel isinputted into the gas discharge section 20.

Referring to FIG. 2 for another preferred embodiment of the presentinvention, an incoming gas sleeve 110 is installed at another end of thefuel chamber 10, and the incoming gas sleeve 110 allows the refilledfuel to enter the fuel chamber 10 and prepare the fuel chamber 10 forthe use of a second time.

With the foregoing components, the transversal rod 240 lifts the gasdischarge pin 210 and the gas discharge pin 210 opens the injectionopening 231 of the control valve 230, so that the fuel passes throughthe gas outlets 421, the foam 320 and then out of the injection opening231. At this moment, the external and internal pressures of the fuelchamber 10 are unequal, and thus the fuel in the fuel chamber 10 isaffected and moved towards the drainage core 40. The external pipe 410wraps a portion of the drainage core 40, and thus the fuel cannot movequickly outward, and the flow is reduced. With a series of pressurereduction measures by the external sleeve 420, the foam 320, the buffer30 and the adjusting member 220, the pressure of the fuel can becontrolled to a safety range during its ignition.

The present invention abandons the use of the large, heavy and expensivecopper, but simply wraps a portion of the drainage core 40 with theexternal pipe 410, so that the area for inputting the fuel into thedrainage core 40 is reduced, and the fuel can be inputted from a rearend of the drainage core 40. The pressure of the fuel is reduced whenthe fuel is discharged so as to achieve the following three mainpurposes.

1. The pressure of the fuel outputted from the fuel chamber 10 will notbe excessively high when the fuel supplying device is in use, and thusthe invention can prevent any sudden output of fuel and avoid anyimproper large flame and provide a safe use of the device.

2. The material cost of the copper product is lowered, and the issue ofejecting extra fuel is overcome. The invention avoids wasting any fuel.

3. The weight of the igniter is reduced to lessen the burden of carryingthe device by women or aged people.

While the invention has been described by means of specific embodiments,numerous modifications and variations could be made thereto by thoseskilled in the art without departing from the scope and spirit of theinvention set forth in the claims.

1. A fuel supplying device of igniter, comprising: a fuel chamber,containing a high-pressure fuel and having an outlet at an end of saidfuel chamber; a gas discharge section, having an end disposed at saidoutlet and the other end extended out from said the outlet, forcontrolling the output of a fuel; a buffer, installed between said gasdischarge section and said fuel chamber for absorbing the pressure ofsaid fuel when discharging said fuel; a drainage core, installed in saidfuel chamber at an end of said gas discharge section with its backfacing said buffer; and an external pipe, disposed on a portion of theperiphery of said drainage core for reducing the fuel incoming area ofsaid drainage core and forcing said fuel to come in from a portion ofsaid drainage core unwrapped by said external pipe for reducing thepressure of said fuel when being discharged.
 2. The device of claim 1,wherein said drainage core is made of a foam material and a plurality ofpores are disposed on the surface of said drainage core.
 3. The deviceof claim 1, wherein said external pipe wraps around said drainage core,and exposes a portion of said drainage core that is far from said bufferfor forcing said fuel coming in from an unwrapped portion of saiddrainage core.
 4. The device of claim 1, wherein said external pipe is adurable, pressure-resisting metal pipe.
 5. The device of claim 3,wherein said external pipe wraps around said drainage core, and theoptimal length of said external pipe is equal to ⅓˜ 9/10 of the lengthof said drainage core.
 6. The device of claim 2, wherein said drainagecore includes an external sleeve sheathing the external periphery of anend facing said buffer, and said external sleeve includes a plurality ofgas outlets disposed at an end proximate to said buffer.
 7. The deviceof claim 6, wherein said external pipe with its end proximate to saidbuffer is coupled with said external sleeve.
 8. The device of claim 6,wherein said external sleeve is coupled integrally with said externalpipe.
 9. The device of claim 1, wherein said buffer comprises: a foam,disposed at an end with its back facing said drainage core for reducingthe pressure of said fuel when being discharged; and a pin member,disposed between said foam and said drainage core, and one part of saidpin member passes through said foam and is exposed from the surface ofsaid foam.
 10. The device of claim 1, wherein said gas discharge sectioncomprises: a control valve, disposed at a position facing said buffer,and having an injection opening disposed on said control valve at an endfacing said buffer, and a second opening disposed at another end; anadjusting member, disposed at a position facing said control valve, andhaving a hole disposed at one end of said adjusting member and a firstopening disposed at the other end, such that a portion of said controlvalve is accommodated in said first opening; and a gas discharge pin,being in a hollow form and having an end extended from said hole out ofsaid adjusting member, and the other end extended from said firstopening into said second opening.
 11. The device of claim 10, whereinsaid gas discharge pin includes a first protruded ring, a secondprotruded ring and a third protruded ring installed in sequence fromsaid hole to said injection opening, and said gas discharge pin includesa plastic pad disposed at an end proximate to said third protruded ringfor prevent said fuel permeating from the gap between said injectionopenings, and said gas discharge pin includes a gas incoming holedisposed between said plastic pad and said third protruded ring, suchthat said fuel passes through said gas incoming hole and out from an endof said gas discharge pin, and said gas discharge pin includes a firstplastic washer disposed at an end proximate to said second protrudedring for preventing said fuel permeating from the gap around theposition where said gas discharge pin is inserted into said adjustingmember.
 12. The device of claim 11, wherein said second protruded ringis slightly larger than said hole, so that said gas discharge pin is notseparated from said adjusting member.
 13. The device of claim 11,wherein said gas discharge pin includes a resilient member disposedbetween said second protruded ring and said third protruded ring, suchthat after said gas discharge pin is pushed outward by an externalforce, the resilience of said resilient member resumes the originalposition of said gas discharge pin.
 14. The device of claim 10, whereinsaid control valve accommodates a portion of said gas discharge pin whencoupling with said adjusting member.
 15. The device of claim 11, whereinsaid control valve includes a second plastic washer disposed at theperiphery of an end proximate to said injection opening for preventingsaid fuel permeating from the gap between said buffers.
 16. The deviceof claim 10, wherein said adjusting member includes a thread sectiondisposed around its periphery, and said thread section is coupled withanother thread section disposed in said outlet, and the degree oftightness between said thread section and said another thread sectioncontrols the level of tightness between said control valve and saidbuffer.
 17. The device of claim 10, wherein said gas discharge sectionincludes a transversal rod disposed at said outlet, and said gasdischarge pin penetrates an end of said transversal rod, so that saidtransversal rod is latched against said first protruded ring of said gasdischarge pin, and said transversal rod drives said plastic pad to shiftand said fuel is sent into said gas discharge section.
 18. The device ofclaim 16, wherein said adjusting member is rotated in a direction, andsaid gas discharge section is coupled with buffer to a certain level oftightness so as to reduce the content of said fuel.
 19. The device ofclaim 16, wherein said adjusting member is rotated in another direction,and said gas discharge section is released from said buffer to a certainlevel of tightness so as to increase the content of said fuel.
 20. Thedevice of claim 1, wherein said fuel chamber includes an incoming gassleeve disposed on the other end, and said incoming gas sleeve refillssaid fuel into said fuel chamber, such that said fuel chamber can bereused.